CN111361720A - Integrated magnetofluid propeller - Google Patents
Integrated magnetofluid propeller Download PDFInfo
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- CN111361720A CN111361720A CN202010222594.6A CN202010222594A CN111361720A CN 111361720 A CN111361720 A CN 111361720A CN 202010222594 A CN202010222594 A CN 202010222594A CN 111361720 A CN111361720 A CN 111361720A
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- 239000011553 magnetic fluid Substances 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 89
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 230000005484 gravity Effects 0.000 claims description 12
- 239000013535 sea water Substances 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 8
- 229910052734 helium Inorganic materials 0.000 claims description 6
- 239000001307 helium Substances 0.000 claims description 6
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 230000008719 thickening Effects 0.000 description 13
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H11/00—Marine propulsion by water jets
- B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
- B63H11/025—Marine propulsion by water jets the propulsive medium being ambient water by means of magneto-hydro-dynamic forces
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
An integrated magnetic fluid thruster comprises an inlet shell (1), a superconducting magnet (2), an outlet shell (3), an outlet connecting section (4), a propelling channel (5), an inlet connecting section (6) and a channel power supply (7). The superconducting magnet, the inlet shell, the propelling passage, the outlet shell, the inlet connecting section and the outlet connecting section form three independent sealed buoyancy cabin bodies; the propeller has the characteristics of relatively simple structure, independent operation and the like, can be used as an independent propulsion unit, and can also be externally connected to equipment such as ships and warships to be used as the propeller.
Description
Technical Field
The invention relates to a magnetofluid thruster.
Background
Magnetic fluid (MHD) propulsion technology is of great interest due to its ultra-silent effect, but since the efficiency of magnetic fluid is proportional to the square of the magnetic field strength, higher propulsion efficiency requires higher magnetic field strength; high magnetic fields necessarily require the use of superconducting magnets. Current superconducting magnets require the use of cryogenic systems, which necessarily add to the volume and weight of the thruster. Due to the problems of volume and weight of the propeller, the noise and flow characteristics of magnetofluid propulsion under high field strength are basically researched through a pipeline platform. The research activity that develops MHD propeller as an independent propulsion unit is less, and its main reason lies in that the magnetic fluid propeller is heavier and bulky, is difficult for shipment or independent utility, installs on the naval vessel and uses the design that often can influence the naval vessel body with it, and needs host computer factory collaborative design, and time and economic cost are higher, are difficult for the practical research of MHD propulsion technique.
In order to research the overall flow and noise characteristics of the MHD propeller and enable the MHD propeller to be practical as soon as possible, the MHD propeller capable of operating independently needs to be constructed, the mutual influence of the MHD propeller and a ship flow boundary layer is avoided when the MHD propeller and the ship are designed into a whole, the MHD propeller and the ship are designed independently, and the further development of the technology is facilitated.
Disclosure of Invention
The invention aims to provide a magnetofluid propeller capable of operating independently in order to promote the development of MHD propelling technology. The integrated magnetofluid propeller can be used independently, can be quickly modified and externally connected to a ship, and is favorable for promoting the practical development of the magnetofluid propeller.
The integrated magnetic fluidization propeller is realized by the following technical scheme:
the integrated magnetofluid propeller is of a streamline structure. The left side is an inlet end which is of a hemispherical structure; the middle part is a propeller part and has a cylindrical shell structure; the right side is a nozzle end and is of a semi-ellipsoidal structure. The integrated magnetic fluid propeller sequentially comprises an inlet cavity, an MHD propeller cavity and an outlet cavity from left to right. The MHD thruster cavity consists of a superconducting magnet and a thrusting channel inserted into a temperature hole of the superconducting magnet. The inlet cavity is formed by sequentially connecting an inlet shell, an inlet connecting section and a bearing flange on the left side of the superconducting magnet, and the inlet connecting section is positioned in the inlet shell and connected with the propelling passage. The outlet cavity is formed by sequentially connecting an outlet shell, an outlet connecting section and a superconducting magnet right bearing flange, and is positioned in the outlet shell and connected with the propelling passage.
The cavity structures of the MHD propeller cavity, the inlet cavity and the outlet cavity enable the buoyancy of the propeller to be slightly larger than gravity, and the propeller has positive buoyancy under water.
The integral magnetofluid thruster is axially symmetrical, the center of the superconducting magnet is arranged in a right M mm position relative to the geometric center of the integral magnetofluid thruster, and M is equal to (G) through a moment balance formula1L1-G2L2)/G3Calculated as wherein G1Is the inlet casing weight, L1Is the distance from the center of gravity of the inlet housing to the geometric center of the propeller, G2Is the outlet casing weight, L2Is the distance from the center of gravity of the outlet casing to the geometric center of the propeller, G3Is the weight of the superconducting magnet.
In the cavity of the MHD thruster, the thrusting channel is coaxial with the superconducting magnet warm hole. The inner surface of the propelling passage is embedded with an electrode and an electrode lead, and the electrode lead is embedded in the inner surface of the propelling passage and is connected with the electrode. The electrode is in the uniform magnetic field intensity area of the superconducting magnet. The channel power supply is fixedly arranged on a left bearing flange at the left end part of the superconducting magnet and symmetrically arranged in the inlet cavity along the central plane of the superconducting magnet, and the channel power supply is connected with a lead interface of an electrode lead in the propelling channel to provide electric energy for the electrode. The superconducting magnet is the heaviest part of the thruster, the gravity center of the superconducting magnet is positioned below the geometric center of the thruster, and the gravity center of the thruster is ensured to be positioned below the floating center of the thruster, so that the upper and lower stability of the thruster is realized.
The axial symmetry arrangement of the propeller in the circumferential direction ensures the circumferential stability of the propeller under water; the axial stability of the propeller is ensured by the symmetrical arrangement of the centers of gravity of the inlet cavity and the outlet cavity of the propeller.
The integrated magnetofluid propeller can independently maintain the stability in seawater, has a rechargeable channel power supply and can be filled with liquid helium. The invention can independently operate underwater, and also can be arranged outside a ship and used as a propeller. Seawater is sucked from the inlet connecting section of the magnetofluid thruster, the seawater is powered by the propelling channel and is ejected from the outlet connecting section under the action of the magnetic field of the superconducting magnet, so that thrust is generated.
The inlet shell is a pressure-resistant shell structure with a hemispherical streamline shape. The inlet shell is composed of latitudinal annular rib plates, longitudinal rib plates and an outer skin structure. The longitudinal ribs are parallel to the axis of the propeller, the latitudinal annular ribs are perpendicular to the axis of the propeller, the longitudinal ribs and the latitudinal annular ribs are arranged in the middle section of the inlet shell in a criss-cross mode, and the outer skin covers the surfaces of the latitudinal annular ribs and the longitudinal ribs. The warp-wise ribbed plates and the weft-wise ribbed plates are uniformly distributed. The left side of entry casing is the propeller entry, and the entry is the annular thickening floor that has the hole, and the hole of annular thickening floor is the water inlet of propeller. The left end face of annular thickening floor is the terminal surface of intaking, and the terminal surface of intaking is machined surface, and the machined surface of annular thickening floor is smooth, along water inlet circumferencial direction evenly distributed has the screw hole, this screw hole be used for with the sealed fixed connection of entry flange of entry linkage section. The right side of entry casing is thickening flange floor, and the outer disc processing on the thickening flange floor has the heavy groove of excircle, and the right side terminal surface of thickening flange is processed and is had annular seal groove, and the annular seal groove outside processing of thickening flange has evenly distributed's screw, and the annular seal groove and the screw of thickening flange are used for sealing and fixing with the left side bearing flange of superconducting magnet.
The superconducting magnet is a functional component, can realize functions of liquid helium perfusion, refrigeration, excitation and the like, and forms an MHD thruster cavity together with the propelling channel. The superconducting magnet is also a main supporting part of the thruster and supports a propelling passage, an inlet shell and an outlet shell of the thruster; the left bearing flange of the superconducting magnet supports the inlet shell, the right bearing flange of the superconducting magnet supports the outlet shell, and the left bearing flange and the right bearing flange at the two ends of the superconducting magnet support the propelling passage together; the superconducting magnet is provided with a cylindrical streamline shell which is a horizontally placed cylindrical structure, the end faces of the left side and the right side are bearing flanges, and the middle part is a vacuum sealed cavity. An axial warm hole is formed in the lower position of the center of the superconducting magnet cylinder; a superconducting coil is arranged in the cavity of the superconducting magnet; the upper end of the outer cylinder of the cavity of the superconducting magnet is provided with a bearing protruding structure, and a liquid helium filling port, a power supply and a control line sealing interface are reserved on the protruding structure; the protruding structure can be provided with a detachable streamline protruding cover and can also be used for being connected with a ship. The left bearing flange of the superconducting magnet is of a plane structure, and threaded holes fixedly connected with the inlet shell and the propelling passage are formed in the outer end face of the left bearing flange; the right bearing flange of the superconducting magnet is of a plane structure, and the outer end face of the right bearing flange is provided with a threaded hole fixedly connected with the outlet shell and the propelling passage; the superconducting magnet is the heaviest component of the thruster.
The outlet shell is provided with a pressure-resistant shell with a semi-ellipsoidal streamline shape. The pressure-resistant shell is composed of longitudinal rib plates, latitudinal annular rib plates and an outer skin; the longitudinal rib plates are parallel to the axis of the propeller, the latitudinal annular rib plates are perpendicular to the axis of the propeller, the longitudinal rib plates and the latitudinal annular rib plates are arranged in the middle section of the outlet shell in a criss-cross mode, and the outer skin covers the surfaces of the latitudinal annular rib plates and the longitudinal rib plates. The longitudinal ribs and the latitudinal annular ribs of the outlet shell are uniformly distributed. The left side of the outlet shell is provided with a thickened flange rib plate, and a sinking groove is processed on the outer circular surface of the thickened flange rib plate. The left end face of the rib plate of the thickened flange is a plane, an annular sealing groove is processed on the plane, screw holes which are uniformly distributed are processed on the outer side of the annular sealing groove, and the sealing groove and the screw holes of the rib plate of the thickened flange are used for sealing and fixing with a right bearing flange of the superconducting magnet. The right side of the outlet shell is provided with a nozzle of the propeller, and the nozzle is an annular thickened ribbed plate with an inner hole; the right end face of the annular thickened ribbed plate is a water outlet of the propeller; the right-hand member face of annular thickening floor is glossy machined surface, and it has evenly distributed's screw hole to process along spout circumferencial direction on the right-hand member face of annular thickening floor, and the machined surface and the screw hole of annular thickening flange are used for the fixed seal of exit linkage section.
The propulsion channel is arranged in the superconducting magnet temperature hole and forms clearance fit with the superconducting magnet temperature hole. An electrode and an electrode lead are embedded in the propelling channel, and a positioning groove is arranged at the joint of the outside of the propelling channel and the superconducting magnet warm hole. The electrodes are embedded in the inner surface of the propelling channel and are in contact with fluid in the channel, the electrodes are titanium platinized electrodes, and the positive electrode and the negative electrode are used in pairs. The electrode lead is embedded in the inner surface of the propelling passage, is connected with the electrode, and leads out a lead interface of the electrode lead on the outer surface of the propelling passage to provide a power supply interface for the electrode. The lead interface of the electrode lead is a threaded interface, and the wiring surface is a plane, so that the connection resistance can be reduced. The electrodes and electrode leads are hermetically insulated from the propulsion passage. The positioning groove is matched with the left bearing flange and the right bearing flange of the superconducting magnet to fix the relative position of the propelling channel and the superconducting magnet, and the electrode can be ensured to be positioned in a uniform magnetic field interval of the superconducting magnet. The direction of the magnetic field of the superconducting magnet in the propelling channel is perpendicular to the direction of the electrode current of the propelling channel and the flowing direction of the magnetofluid in the propelling channel, so that the left-hand rule is met.
The inlet connecting section consists of an inlet connecting flange, a horn inlet section and a soft connecting section. The inlet connecting flange is of a flange structure consisting of an end face flange and a protruding cylindrical flange. The end face flange is of a plane structure, an annular sealing groove is machined along an inner hole, and connecting screw holes are evenly machined in the outer side of the annular sealing groove and used for being connected, fixed and sealed with an annular thickened rib plate on the left side of the inlet shell. The protruding cylindrical flange is of a circular ring structure, two annular sealing grooves are uniformly formed in the inner hole surface of the protruding cylindrical flange along the axial direction, and the protruding cylindrical flange can be in sealing fit with the outer circle of the left cylindrical section of the inlet section of the horn through a sealing ring. The inlet section of the horn is a variable cross-section, the left side of the inlet section of the horn is provided with a cylindrical section which is hermetically connected with an inner hole of a protruding cylindrical flange of the inlet connecting flange, and the right side of the inlet section of the horn is provided with a cylindrical section with the same diameter as the propelling channel. The inlet section of the horn is in a gradually reducing shape from left to right, the sectional area of the inlet of the left cylindrical section is N times of that of the propelling passage, and N is larger than 1. The soft connection section is a rubber clamp connection section. The entrance connecting section is fixed with the annular thickened ribbed plate on the left side of the entrance shell in a sealing mode through the left entrance connecting flange, and is connected with the left side of the propulsion channel in a sealing mode through the soft connecting section on the right side, and the middle of the entrance connecting section is a horn entrance section.
The outlet connecting section consists of an outlet connecting flange, a reducing outlet section and a soft connecting section. The outlet connecting flange is of a flange structure consisting of an outlet end face flange and a protruding cylindrical flange. The outlet end face flange is of a plane structure, an annular sealing groove is formed in the plane along the outer side of an inner hole, and connecting screw holes are uniformly processed in the outer side of the annular sealing groove along the circumferential direction and are used for being connected, fixed and sealed with an annular thickened rib plate on the right side of the outlet shell. The protruding cylindrical flange is of a cylindrical ring structure, two annular sealing grooves are uniformly formed in the inner hole surface of the protruding cylindrical flange along the axial direction, and the protruding cylindrical flange is in sealing fit with the outer circle of the cylindrical section on the right side of the tapered outlet section through a sealing ring. The reducing outlet section is a variable cross-section, the left side of the reducing outlet section is provided with a cylindrical section with the same diameter as the propelling channel, and the right side of the reducing outlet section is provided with a cylindrical section which is connected with the inner hole of the protruding cylindrical flange of the outlet connecting flange in a sealing manner. The middle of the reducing outlet section is in a reducing shape, the sectional area of the outlet of the right cylindrical section is K times of the sectional area of the propelling passage, and K is less than or equal to 1. The soft connection section is a rubber clamp connection section. The exit linkage section is through left flexible coupling section and propulsion passageway right side sealing connection, and the exit flange through the right side is fixed with the annular thickening floor on export casing right side sealing, and the centre of exit linkage section is the convergent export section.
Drawings
Fig. 1 is an installation schematic diagram of an integrated magnetofluid thruster, in which 1 is an inlet housing, 2 is a superconducting magnet, 3 is an outlet housing, 4 is an outlet connection section, 5 is a thrusting channel, 6 is an inlet connection section, and 7 is a channel power supply;
fig. 2 is a view of the inlet housing structure, in which: 1-1 is an annular thickened ribbed plate of an inlet end, 1-2 is a thickened flange ribbed plate of an inlet shell, 1-3 is an excircle sink groove, a screw hole and a sealing groove of the inlet shell, 1-4 is a longitudinal ribbed plate, 1-5 is a latitudinal annular ribbed plate, and 1-6 is a skin of the inlet shell;
fig. 3 is a schematic diagram of a superconducting magnet, in which: 2-1 is a left bearing flange, 2-2 is a right bearing flange, 2-3 is a superconducting magnet warm hole, and 2-4 is a detachable streamline protruding cover;
fig. 4 is a view of the outlet housing structure, in which: 3-1 is a thickened flange rib plate of the outlet shell, 3-2 is an annular thickened rib plate of the outlet shell, 3-3 is a latitudinal annular rib plate, 3-4 is a longitudinal rib plate, 3-5 is a skin of the outlet shell, and 3-6 is an annular sealing groove of the thickened flange rib plate of the outlet shell;
fig. 5 is an assembled view of the propulsion duct, wherein: 5-1 is an electrode, 5-2 is an electrode lead, 5-3 is a positioning groove structure, and 5-4 is a lead interface;
FIG. 6 is an assembly view of the inlet connection section, wherein: 6-1 is a flange connected with the inlet, 6-2 is a soft connecting section, and 6-3 is a horn inlet section;
FIG. 7 is a cross-sectional view of an inlet attachment flange, wherein: 6-4 is an end face flange, 6-5 is a protruding cylindrical flange, 6-6 is an end face sealing groove and a sealing ring, 6-7 is a cylindrical surface sealing groove and a sealing ring I, and 6-8 is a cylindrical surface sealing groove and a sealing ring II;
FIG. 8 is an assembled view of the outlet connection section, wherein: 4-1 is a soft connecting section, 4-2 is a flange connected with an outlet, and 4-3 is a tapered outlet section;
FIG. 9 is a cross-sectional view of an outlet connection flange, wherein: 4-4 are outlet end face flange, 4-5 are protruding cylindrical flange, 4-6 are end face seal groove and sealing ring, 4-7 are cylindrical face seal groove and sealing ring I, and 4-8 are cylindrical face seal groove and sealing ring II.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1, the integrated magnetofluid thruster of the present invention has a streamline structure, and the left side is an inlet end and has a hemispherical structure; the middle part is a propeller part and has a cylindrical shell structure; the right side is a nozzle end and is of a semi-ellipsoidal structure. The integrated magnetofluid thruster comprises an inlet cavity, a MHD thruster cavity and an outlet cavity from left to right. The superconducting magnet 2 and the propelling passage 5 form an MHD thruster cavity, the inlet shell 1, the inlet connecting section 6 and a left bearing flange (2-1) of the superconducting magnet 2 are sequentially connected into an inlet cavity, and the outlet shell 3, the outlet connecting section 4 and a right bearing flange (2-2) of the superconducting magnet 2 are sequentially connected into an outlet cavity. The inlet connection section 6 is located in the inlet housing 1 and connected to the propulsion duct 5, and the outlet connection section 4 is located in the outlet housing 3 and connected to the propulsion duct 5. The three large cavities, namely the inlet cavity, the MHD propeller cavity and the outlet cavity, enable the buoyancy of the propeller to be slightly larger than the gravity, and the propeller has positive buoyancy under water.
In the cavity of the MHD thruster, the center of the superconducting magnet 2 is arranged close to the right 50mm relative to the geometric center of the shell, the channel power supply 7 is arranged on a bearing flange 2-1 on the left side of the superconducting magnet 2, and the propelling channel 5 is coaxial with a superconducting magnet warm hole 2-3. An electrode 5-1 is embedded on the inner surface of the propelling passage 5, and an electrode lead 5-2 is embedded on the inner surface of the propelling passage and connected with the electrode 5-1. The electrode 5-1 is in the uniform magnetic field intensity region of the superconducting magnet 2. The channel power supply 7 is fixedly arranged on a flange 2-1 at the left end part of the superconducting magnet and symmetrically arranged along the central plane of the superconducting magnet 2, and the channel power supply 7 is connected with a propulsion channel electrode lead 5-2 through a lead interface 5-4 to provide electric energy for a propulsion channel. The gravity center of the superconducting magnet is 70mm lower than the geometric center. The inlet cavity and the outlet cavity are symmetrically arranged in terms of gravity center. The whole structure of the propeller is stable underwater, front and back, and up and down.
As shown in figure 2, the inlet shell 1 is a pressure shell with a hemispherical streamline shape and consists of external skins 1-6 of latitudinal annular rib plates 1-5 and longitudinal rib plates 1-4. The longitudinal rib plates 1-4 are parallel to the axis of the propeller; the latitudinal annular rib plates 1-5 are perpendicular to the axis of the propeller and are arranged in the middle section of the inlet shell in a criss-cross mode with the longitudinal rib plates; the outer skins 1-6 cover the surfaces of the latitudinal annular rib plates 1-5 and the longitudinal rib plates 1-4. The left side of the inlet shell 1 is provided with an inlet of a propeller, the inlet is an annular thickened ribbed plate 1-1 with an inner hole, and the inner hole of the annular thickened ribbed plate 1-1 is a water inlet of the propeller; threaded holes are uniformly distributed on the left end face processing surface of the annular thickened rib plate 1-1 in the circumferential direction of the water inlet and are used for sealing and fixing an end face flange 6-4 of the inlet connecting section 6. The right side of the inlet shell 1 is provided with a thickened flange ribbed plate 1-2, the end face of the thickened flange ribbed plate 1-2 is perpendicular to the axis of the thruster, and the thickened flange ribbed plate 1-2 is provided with an excircle sink groove, a screw hole and a sealing groove 1-3 for sealing and fixing with a left bearing flange 2-1 of the superconducting magnet 2; the longitudinal rib plates 1-4 and the latitudinal ring rib plates 1-5 are uniformly distributed. An inlet connection section 6 is located in the inlet housing 1 and is connected to the propulsion channel 5. The inlet shell 1, the inlet connecting section 6 and the left bearing flange 2-1 of the superconducting magnet 2 are sequentially connected to form a sealed inlet cavity.
As shown in fig. 3, the superconducting magnet 2 is a functional component, and has functions of filling liquid helium, cooling, excitation, and the like. The superconducting magnet 2 is of a cylindrical shell structure and is horizontally arranged, the left end face is a left bearing flange 2-1, the right end face is a right bearing flange 2-2, the middle cylinder is a vacuum sealed cavity, a superconducting magnet warm hole 2-3 is formed in the position 70mm below the center of the cavity, and a detachable streamline-shaped protruding cover 2-4 is arranged at the upper end of the cavity; the left bearing flange 2-1 is provided with a threaded hole fixedly connected with the inlet shell 1 and the propulsion channel 5; the right bearing flange 2-2 is provided with a threaded hole fixedly connected with the outlet shell 3 and the propelling passage 5. The superconducting magnet 2 is capable of supporting the bending moment generated by the front shell 1, the rear shell 3 and the intermediate propulsion passage 5 of the thruster. And a superconducting coil is arranged in the middle cylindrical vacuum sealed cavity of the superconducting magnet 2. The upper end of a vacuum sealing cavity of the superconducting magnet is provided with a bearing protruding structure, and a liquid helium filling port, a power supply and a control line sealing interface are reserved on the protruding structure; the convex structure is provided with detachable streamline convex covers 2-4, and the convex structure can also be used for being connected with a ship.
As shown in FIG. 4, the outlet casing 3 is a pressure-resistant casing structure with a semi-ellipsoidal streamline shape, and is composed of latitudinal annular rib plates 3-3, longitudinal rib plates 3-4 and skins 3-5. The longitudinal rib plates 3-4 are parallel to the axis of the propeller, the latitudinal annular rib plates 3-3 are perpendicular to the axis of the propeller, the longitudinal rib plates and the latitudinal annular rib plates are arranged at the middle section of the outlet shell in a criss-cross mode, and the outer skin 3-5 covers the surfaces of the latitudinal annular rib plates and the longitudinal rib plates. The longitudinal rib plates 3-4 and the latitudinal ring rib plates 3-3 are uniformly distributed. The left side of the outlet shell 3 is provided with a thickened flange ribbed plate 3-1, and the left side end face of the thickened flange ribbed plate 3-1 is a processing surface which is vertical to the axis of the propeller. An outer circle sink groove is processed on the outer circle surface of the thickened flange rib plate 3-1, an annular sealing groove 3-6 is processed on the left side end surface of the thickened flange rib plate, and screw holes which are uniformly distributed are processed on the outer side of the annular sealing groove and are used for sealing and fixing with a right bearing flange 2-2 of the superconducting magnet 2; the right side of the outlet shell 3 is provided with a nozzle of a propeller, and the nozzle is an annular thickened ribbed plate 3-2 with an inner hole. The end face of the annular thickened ribbed plate 3-2 is perpendicular to the axial line of the propeller, the end face of the right side of the annular thickened ribbed plate 3-2 is a processing surface, and threaded holes are uniformly formed in the right side end face of the annular thickened ribbed plate along an inner hole and are used for sealing and fixing an outlet end face flange 4-4 of the outlet connecting section 4. The outlet connection section 4 is located in the outlet housing 3 and is connected to the propulsion duct 5. The outlet shell 3, the outlet connecting section 4 and the right bearing flange 2-2 of the superconducting magnet are sequentially connected to form an outlet cavity.
As shown in fig. 5, the propelling passage 5 is installed in the warm bore 2-3 of the superconducting magnet 2, and forms a clearance fit with the warm bore 2-3 of the superconducting magnet 2. The inner surface of the propelling passage 5 is embedded with an electrode 5-1 and an electrode lead 5-2. The electrode 5-1 is in contact with the fluid in the propelling passage 5, the electrode 5-1 adopts a titanium platinized electrode, and the positive electrode and the negative electrode are used in pairs. The electrode lead 5-2 is embedded in the inner surface of the propelling passage 5 and is in contact with the electrode 5-1, and a lead interface 5-4 of the electrode lead 5-2 is led out of the outer surface of the propelling passage 5 to provide power for the electrode 5-2. The lead interface 5-4 of the electrode lead 5-2 is a threaded interface, and the wiring surface is a plane, so that the connection resistance can be reduced. The electrode 5-1 and the electrode lead 5-2 are kept hermetically insulated from the propulsion channel 5. A positioning groove structure 5-3 is arranged outside the propelling channel 5, the positioning groove 5-3 is matched with a left bearing flange 2-1 and a right bearing flange 2-2 of the superconducting magnet 2, the relative position of the propelling channel 5 and the superconducting magnet 2 is fixed, and the electrode of the propelling channel 5 is ensured to be positioned in a uniform magnetic field interval of the superconducting magnet 2. The magnetic field direction of the superconducting magnet 2 in the propelling channel 5 is perpendicular to the current direction of the electrode 5-1 of the propelling channel 5 and the flow direction of the magnetofluid in the propelling channel 5, and the left-hand rule is met.
As shown in fig. 6 and 7, the inlet connecting section 6 is composed of an inlet connecting flange 6-1, a horn inlet section 6-3 and a soft connecting section 6-2. The inlet connecting flange 6-2 is a flange structure consisting of an end face flange 6-4 and a protruding cylindrical flange 6-5. The end face flange 6-4 is provided with an annular sealing groove and a sealing ring 6-6 along an inner hole, and threaded connecting holes are uniformly arranged on the outer side of the sealing groove along the circumferential direction and used for fixing and sealing with an annular thickened ribbed plate 1-1 at the left inlet end of the inlet shell 1. The cylindrical surface sealing groove and the sealing ring 6-7 are uniformly arranged on the inner hole surface of the protruding cylindrical flange 6-5 along the axis, and the cylindrical surface sealing groove and the sealing ring 6-8 are in sealing fit with the outer circle of the cylindrical section on the left side of the horn inlet section 6-3. The inlet section 6-3 of the horn is a variable cross-section, the left side of the inlet section is provided with a cylindrical section which is hermetically connected with an inner hole of a protruding cylindrical flange 6-5 of the inlet connecting flange-6-1, the right side of the inlet section is provided with a cylindrical section with the same diameter as the propelling channel 5, the middle of the cylindrical section is in a tapered shape, the inlet cross-sectional area of the cylindrical section on the left side is N times of the cross-sectional area of the propelling channel 5, and N. The soft connecting section 6-2 is a rubber clamp connecting section. The inlet connecting section 6 is hermetically fixed with an annular thickened ribbed plate 1-1 on the left end face of the inlet shell 1 through an inlet connecting flange 6-1, and is hermetically connected with a pushing channel 5 on the left side through a flexible connecting section 6-2.
As shown in fig. 8 and 9, the outlet connecting section 4 is composed of an outlet connecting flange 4-2, a tapered outlet section 4-3 and a soft connecting section 4-1. The outlet connecting flange 4-2 is a flange structure consisting of an outlet end face flange 4-4 and a protruding cylindrical flange 4-5. An annular sealing groove and a sealing ring 4-6 are arranged along an inner hole of the outlet end face flange 4-4, and connecting screw holes are uniformly formed in the outer side of the annular sealing groove and used for fixing and sealing with the annular thickened rib plate 3-2 on the right side of the outlet shell 3. And the inner hole surface of the protruding cylindrical flange 4-5 is uniformly provided with a cylindrical surface sealing groove and a sealing ring 4-7 and two sealing structures of the cylindrical surface sealing groove and the sealing ring 4-8 along the axis, and can be in sealing fit with the outer circle of the cylindrical section on the right side of the tapered outlet section 4-3. The tapered outlet section 4-3 is a variable cross-section, the left side is provided with a cylindrical section with the diameter equal to that of the propelling channel 5, the right side is provided with a cylindrical section which is hermetically connected with an inner hole of a protruding cylindrical flange 4-5 of the outlet connecting flange 4-2, and the middle is in a tapered shape. The outlet sectional area of the cylindrical section at the right side of the reducing outlet section is K times of the sectional area of the propelling passage 5, and K is less than or equal to 1. The soft connecting section 4-1 is a rubber clamp connecting section. The outlet connecting section 4 is connected with the right side of the propelling passage 5 in a sealing manner through a soft connecting section 4-1 and is fixed with the annular thickened ribbed plate 3-2 on the right side of the outlet shell 3 in a sealing manner through an outlet connecting flange 4-2.
When the thruster operates on the sea, seawater is sucked from the inlet connecting section 1 of the magnetofluid thruster, the channel power supply 6 supplies power to the seawater through the electrode 5-1 of the propulsion channel 5, and the seawater is sprayed out from the outlet connecting section 3 under the action of the magnetic field of the superconducting magnet 2, so that thrust is generated.
Claims (9)
1. An integrated magnetic fluid propeller is characterized in that: the integrated magnetofluid thruster is of a streamline structure; the left side of the integrated magnetofluid thruster is an inlet end and is of a hemispherical structure, the middle part of the integrated magnetofluid thruster is a thruster part and is of a cylindrical shell structure, and the right side of the integrated magnetofluid thruster is a nozzle end and is of a semi-ellipsoidal structure; the integrated magnetofluid thruster comprises an inlet cavity, an MHD thruster cavity and an outlet cavity from left to right; the MHD thruster cavity consists of a superconducting magnet and a propelling channel inserted into a temperature hole of the superconducting magnet; the inlet cavity is formed by sequentially connecting an inlet shell (1), an inlet connecting section (6) and a bearing flange (2-1) on the left side of the superconducting magnet; the inlet connecting section (6) is positioned in the inlet shell (1) and is connected with the propelling passage (5); the outlet cavity is formed by sequentially connecting an outlet shell (3), an outlet connecting section (4) and a bearing flange (2-2) on the right side of the superconducting magnet; the outlet connecting section (4) is positioned in the outlet shell (3) and is connected with the propelling channel (5); the cavity structures of the inlet cavity, the MHD propeller cavity and the outlet cavity enable the buoyancy of the propeller to be larger than the gravity, and the propeller has positive buoyancy under water; seawater is sucked from the inlet connecting section, the propulsion channel supplies power to the seawater, and the seawater is ejected from the outlet connecting section under the action of the magnetic field of the superconducting magnet, so that thrust is generated.
2. The integrated magnetic fluid mover of claim 1, wherein: the inlet shell (1) is a hemispherical pressure-resistant shell structure formed by latitudinal annular rib plates, longitudinal rib plates and an outer skin; the longitudinal rib plates (1-4) are parallel to the axis of the propeller, the latitudinal annular rib plates (1-5) are perpendicular to the axis of the propeller, the longitudinal rib plates (1-4) and the latitudinal annular rib plates (1-5) are arranged in the middle section of the inlet shell (1) in a criss-cross mode, and the outer skin (1-6) covers the surfaces of the latitudinal annular rib plates (1-5) and the longitudinal rib plates (1-4).
3. The integrated magnetic fluid mover of claim 1, wherein: the left side of the inlet shell (1) is provided with an inlet of the propeller, the inlet is an annular thickened ribbed plate (1-1) with an inner hole, and the inner hole of the annular thickened ribbed plate (1-1) is a water inlet of the propeller; threaded holes are uniformly distributed along the circumferential direction of the water inlet and are used for being in sealing fit with the inlet connecting section (6); the left end face of the annular thickened rib plate (1-1) is a water inlet end face, and the water inlet end face is a processing surface; the right side of the inlet shell (1) is provided with a thickened flange rib plate (1-2), and the end surface of the thickened flange rib plate (1-2) is vertical to the axial line of the propeller; the rib plate (1-2) of the thickened flange is provided with an excircle sink groove, a screw hole and a sealing groove (1-3) which are used for sealing and fixing the left bearing flange (2-1) of the superconducting magnet (2).
4. The integrated magnetic fluid mover of claim 1, wherein: the superconducting magnet (2) is of a cylindrical structure with a cylindrical streamline shell and is horizontally placed, the left end face and the right end face of the superconducting magnet are bearing flanges, a vacuum sealed cavity is arranged in the middle of the superconducting magnet, and a superconducting coil is arranged in the cavity; an axial warm hole is formed in the lower position of the center of the cylinder of the superconducting magnet; the upper end of the cylinder outside the cavity is provided with a load-bearing projecting structure, and a liquid helium filling port, a power supply and a control line sealing interface are reserved on the projecting structure; the protruding structure is provided with a detachable streamline-shaped protruding cover (2-4) which is used for being connected with a ship; a left bearing flange (2-1) of the superconducting magnet (2) is of a plane structure, and a fixed connection threaded hole connected with the inlet shell (1) and the propelling passage (5) is formed in the outer end face of the left bearing flange (2-1); the right bearing flange (2-2) of the superconducting magnet (2) is of a plane structure, and a fixed connection threaded hole between the outlet shell (3) and the propelling passage (5) is formed in the outer end face of the right bearing flange (2-2).
5. The integrated magnetic fluid mover of claim 1, wherein: the center of the superconducting magnet (2) is close to the geometric center of the integrated magnetofluid thruster by M mm, and M passes through a moment balance formulaM＝(G1L1-G2L2)/G3Calculated as wherein G1Is the inlet casing weight, L1Is the distance from the center of gravity of the inlet housing to the geometric center of the propeller, G2Is the outlet casing weight, L2Is the distance from the center of gravity of the outlet casing to the geometric center of the propeller, G3Is the weight of the superconducting magnet.
6. The integrated magnetic fluid mover of claim 1, wherein: the propelling passage (5) is arranged in a warm hole of the superconducting magnet (2) and forms clearance fit with the warm hole; an electrode (5-1) and an electrode lead (5-2) are embedded in the inner surface of the propelling passage (5), and the electrode (5-1) is in contact with fluid in the propelling passage (5); a positioning groove (5-3) is arranged at the joint of the outer part of the propulsion channel (5) and the warm hole; the positioning groove (5-3) is matched with the left bearing flange (2-1) and the right bearing flange (2-2) to fix the relative position of the propelling passage (5) and the superconducting magnet (2) and ensure that the electrode (5-1) is positioned in a uniform magnetic field interval of the superconducting magnet (2); a lead interface of an electrode lead (5-1) is led out from the outer surface of the propulsion channel (5) to provide a power interface for the electrode (5-1); the electrode (5-1) and the electrode lead (5-2) are hermetically insulated from the propulsion channel (5); the lead interface (5-4) of the electrode lead (5-2) is a threaded interface, and the wiring surface is a plane so as to reduce the connection resistance; the channel power supply (7) is arranged on a left bearing flange (2-1) of the superconducting magnet (2) and is symmetrically arranged along the central plane of the superconducting magnet; the channel power supplies (7) are arranged in the inlet cavity in an axial symmetry manner and are fixed on a left bearing flange (2-1) of the superconducting magnet (2); the magnetic field direction of the superconducting magnet (2) in the propelling channel (5) is perpendicular to the current direction of the electrode (5-1) of the propelling channel (5) and the flow direction of the magnetofluid in the propelling channel (5), and the left-hand rule is met.
7. The integrated magnetic fluid mover of claim 1, wherein: the outlet shell (3) is of a pressure-resistant shell structure with a semi-ellipsoidal streamline shape and consists of latitudinal annular rib plates (3-3), longitudinal rib plates (3-4) and an external skin (3-5); the longitudinal rib plates (3-4) are parallel to the axis of the propeller, the latitudinal annular rib plates (3-3) are perpendicular to the axis of the propeller, the longitudinal rib plates (3-4) and the latitudinal annular rib plates (3-3) are arranged in the middle section of the outlet shell (3) in a criss-cross mode, and the outer skin (3-5) covers the outer surfaces of the latitudinal longitudinal annular rib plates (3-3) and the longitudinal rib plates (3-4); the left side of the outlet shell (3) is provided with a thickened flange rib plate (3-1), and the left end face of the thickened flange rib plate (3-1) is a processing surface and is vertical to the axis of the propeller; the outer circle of the thickened flange rib plate (3-1) is provided with a sink groove, the left plane of the thickened flange rib plate (3-1) is provided with an annular sealing groove (3-6), and the outer side of the annular sealing groove (3-6) is provided with uniformly distributed screw holes for sealing and fixing with a right bearing flange (2-2) of the superconducting magnet (2); the right side of the outlet shell (3) is provided with a nozzle of a propeller, and the nozzle is an annular thickened ribbed plate (3-2) with an inner hole; the end face of the annular thickened rib plate (3-2) is vertical to the axis of the propeller, the end face of the right side of the annular thickened rib plate (3-2) is a processing surface, and threaded holes are uniformly distributed on the end face along the circumferential direction of an inner hole and used for sealing and fixing the outlet connecting section (4).
8. The integrated magnetic fluid mover of claim 1, wherein: the inlet connecting section (6) consists of an inlet connecting flange (6-1), a horn inlet section (6-3) and a soft connecting section (6-2); the inlet connecting flange (6-2) is of a flange structure consisting of an end face flange (6-4) and a protruding cylindrical flange (6-5); the end face flange (6-4) is provided with an annular sealing groove and a sealing ring (6-6) along an inner hole, and threaded connecting holes are uniformly arranged on the outer side of the annular sealing groove and are used for being connected, fixed and sealed with an annular thickened ribbed plate (1-1) at the left inlet end of the inlet shell (1); the inner hole surface of the protruding cylindrical flange (6-5) is uniformly provided with a cylindrical surface sealing groove and a sealing ring (6-7) along the axis, and the cylindrical surface sealing groove and the sealing ring (6-8) are in sealing fit with the outer circle of the cylindrical section on the left side of the horn inlet section (6-3); the soft connecting section (6-2) is a rubber hoop connecting section; the horn inlet section (6-3) is a variable cross-section, the left side of the horn inlet section is provided with a cylindrical section which is hermetically connected with an inner hole of a protruding cylindrical flange (6-5) of the inlet connecting flange (6-1), the right side of the horn inlet section is provided with a cylindrical section with the same diameter as the propelling channel (5), the middle of the horn inlet section is in a gradually-reduced shape, the inlet cross-sectional area of the cylindrical section on the left side is N times of the cross-sectional area of the propelling channel (5), and N; the inlet connecting section (6) is hermetically fixed with the left end face of the inlet shell (1) through an inlet connecting flange (6-1) and is hermetically connected with the left side of the propelling passage (5) through a soft connecting section (6-2).
9. The integrated magnetic fluid mover of claim I, wherein: the outlet connecting section (4) consists of an outlet connecting flange (4-2), a reducing outlet section (4-3) and a soft connecting section (4-1); the outlet connecting flange (4-2) is of a flange structure consisting of an outlet end face flange (4-4) and a protruding cylindrical flange (4-5), the outlet end face flange (4-4) is provided with an annular sealing groove and a sealing ring (4-6) along an inner hole, and the outer side of the annular sealing groove is uniformly provided with connecting screw holes along the circumferential direction for connecting, fixing and sealing with an annular thickened rib plate (3-2) on the right side of the outlet shell (3); the inner hole surface of the protruding cylindrical flange (4-5) is uniformly provided with two sealing structures, namely a cylindrical surface sealing ring and a sealing ring (4-7), the cylindrical surface sealing ring and the sealing ring (4-8), along the axis, and the sealing ring and the outer circle of the cylindrical section on the right side of the reducing outlet section (4-3) are in sealing fit; the tapered outlet section (4-3) is a variable cross-section, the left side of the tapered outlet section is provided with a cylindrical section with the diameter equal to that of the propelling channel (5), the right side of the tapered outlet section is provided with a cylindrical section which is hermetically connected with an inner hole of a protruding cylindrical flange (4-5) of the outlet connecting flange (4-2), and the middle of the tapered outlet section is in a tapered shape; the sectional area of the outlet of the right cylindrical section is K times of the sectional area of the propulsion channel (5), and K is less than or equal to 1; the soft connecting section (4-1) is a rubber hoop connecting section; the outlet connecting section (4) is hermetically connected with the right side of the propelling passage (5) through a soft connecting section (4-1) and is hermetically fixed with the right side of the outlet shell (3) through an outlet connecting flange (4-2).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022183920A1 (en) * | 2021-03-01 | 2022-09-09 | 陈晓彬 | Electromagnetic fluid vortex power device |
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